I have an intermittent misfire - following my stupidity in cleaning the cam covers with a pressure washer to find an oil leak!

I have doused everything in WD40, taken all the connectors off the coil packs and injectors, dried, WD40d etc and done the same to the amplifier.

I took the opportunity to chage the plugs (still on the originals at 107,000 miles as far as I know). I was surprised how easy this was - and at how cheap, £28 for a set of 6 - they must have made a mistake!!

Anyway, putting back the coil packs, I seem to have a hairline crack running the length of one and another area shows signs of tracking. If anyone has a spare coil pack (it's the longest length drivers side - I guess they're symmetrical) that I could loan to check whether this is the case before I fork out what I assume will be ££££££££££££££s, I would appreciate it. I will pay postage etc both ways.

Thanks in advance.